Lessons what I have learned: Never check the tyre pressure on the way to a
competition grid. Pump if obviously low and dangerous but otherwise leave
well alone.

In 2005 I did check the pressure at the 15s. Tyre went down and could not
be re-inflated as valve was jammed. Valve could not be replaced. Had to
replace the entire wheel. Got to the start, landed out in a penalty zone
took 500 point penalty. Altogether a bad day!

Jim